What are the legal rights behind making flash cards from textbooks and then selling them to other students?

Question

I was thinking about making flash cards of vocabulary words on my computer and then selling the flash cards to other students.

Answer 1

Depends on the scale. If you're just selling to a few students and barely getting enough to cover the overhead, nobody is going to care. If you go multi-campus and are making enough of a profit to live off of then you might have somebody crying foul

Answer 2

Check your school's policy. (If you are a teacher, you can't sell anything to students at my school)